Feeder accessory for a bird cage



FIG. 1 is a perspective view taken from the top, front and left side of a feeder accessory for a bird cage showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a rear elevational view thereof; and

FIG. 4 is a bottom plan view thereof. 

The ornamental design for feeder accessory for a bird cage, substantially as shown and described. 